1.	Simplify 1 Simplify the following expression: $$ 2(-5)(-1) - \left(6(-4) + 2\times6\right) $$ Correct Answer $$ 22$$ or 22.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{-4\times2 - \frac{-1}{5}}{2\times6\times5} $$ Correct Answer $$ \frac{-13}{100}$$ or -0.130000

3.	Fractions 1 Simplify the following expression: $$ \frac{2}{2} - \frac{-2}{3} $$ Correct Answer $$ \frac{5}{3}$$ or 1.6666666666666665

4.	Fractions 2 Simplify the following expression: $$ \frac{1}{5}\frac{-6}{4} $$ Correct Answer $$ \frac{-3}{10}$$ or -0.30000000000000004

5.	Significant figures 1. Write the following to 2 significant figures: 2.1227217 Correct Answer 2.1 or $$2.1\times10^{0}$$ 2. Write the following to 3 significant figures: 0.0022298969 Correct Answer 0.00223 or $$2.23\times10^{-3}$$

6.	Standard Form 1. Write the following in standard form to 2 significant digits: 0.0444498 Correct Answer $$4.4\times10^{-2}$$ 2. Write the following in standard form to 2 significant digits: 0.118031 Correct Answer $$1.2\times10^{-1}$$

7.	Significant figures 1. Write the following in preferred standard form to 5 significant digits: 1864.764 Correct Answer $$1.8648\times10^{3}$$ 2. Write the following in preferred standard form to 5 significant digits: 0.00000534184 Correct Answer $$5.3418\times10^{-6}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{\frac{-1}{-5} + 4\times5}{{\left(\frac{5}{-1}\right)}^{2}} $$ Correct Answer $$ \frac{101}{125}$$ or 0.808000

9.	Simplify 1 Simplify the following expression: $$ 2\times3\times1\left(1 - 6 + -4 - 1\right) $$ Correct Answer $$ -60$$ or -60.0000

10.	Simplify 2 Simplify the following expression: $$ {\left(1 - 6\right)}^{2} - \frac{6 + -4}{2 + 1} $$ Correct Answer $$ \frac{73}{3}$$ or 24.3333